Metal-work; a handbook for teachers and students (1914)
Adam, Hugh M. [from old catalog], Evans, James Humphrey, [from old catalog] joint author · New York, Longmans, Green and co.; London, E. Arnold · leaf 66
fcopper ore known tobe free from iron andsulphur, and rich inoxides and silica. Theslag this time absorbsmost of the iron, andthe oxygen from theadded ore helps to dis-place the sulphur fromany remaining ironsulphide. The mattfrom this process con-tains about 60 to 70per cent, of copper, andis… … Fig. 13. — Sectional Elevation ofFig. 12. 4 50 METAL-WORK to a heat just below that required for melting, when part ofthe sulphur is removed, with the formation of copper oxide.The product is then fused, and appears to boil, due to the factthat when copper sulphide and copper oxide are…
Metal-work
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